1 files changed, 2 insertions, 9 deletions
diff --git a/src/array.c b/src/array.c
index 6ec20d673..37f1474df 100644
--- a/src/array.c
+++ b/src/array.c
@@ -177,10 +177,7 @@ mrb_ary_concat_m(mrb_state *mrb, mrb_value self)
 {
   mrb_value other;
 
-  mrb_get_args(mrb, "o", &other);
-  if (mrb_type(other) != MRB_TT_ARRAY) {
-    mrb_raise(mrb, E_ARGUMENT_ERROR, "expected Array");
-  }
+  mrb_get_args(mrb, "A", &other);
   mrb_ary_concat(mrb, self, other);
   return self;
 }
@@ -193,11 +190,7 @@ mrb_ary_plus(mrb_state *mrb, mrb_value self)
   mrb_value other;
   mrb_value ary;
 
-  mrb_get_args(mrb, "o", &other);
-  if (mrb_type(other) != MRB_TT_ARRAY) {
-    mrb_raise(mrb, E_ARGUMENT_ERROR, "expected Array");
-  }
-
+  mrb_get_args(mrb, "A", &other);
   ary = mrb_ary_new_capa(mrb, a1->len + RARRAY_LEN(other));
   a2 = mrb_ary_ptr(ary);
   memcpy(a2->buf, a1->buf, sizeof(mrb_value)*a1->len);